A sheet metal worker's tools split by where the work happens: hand tools — aviation snips, tinner's hammer, vise grips, hand seamers, crimpers — plus layout tools like the combination square and dividers, then the shop machines that form flat sheet into duct, and the field power tools.
The tool list we can document for the trade comes from a union local, SMART Local 27; beyond it, who furnishes what varies shop by shop.
Hand tools: snips, seamers, crimpers
The tool list our research can document for this trade stages its picks in three steps.
SMART Sheet Metal Workers Local 27 in New Jersey requires its pre-apprentices to bring a 25-ft tape, work gloves, a marker, pen or pencil and a notepad on day one; within 30 days a 16-oz tinner's hammer, 10-inch vise grips, screwdrivers, a rivet set, a 10-inch adjustable wrench, a 3/16-inch drift pin, an apron or pouch and a toolbox; and within 60 days left- and right-hand aviation snips, a scratch awl, a center punch, a 12-inch combination square and 24-inch quick-set dividers.
What each does:
- Aviation snips cut the sheet, and they come in left- and right-hand versions that cut in opposite directions — Local 27's list requires the pair.
- The tinner's hammer — 16 oz on the list — is a lighter hammer for forming, seaming and straightening thin sheet.
- Vise grips are locking pliers: they clamp a seam or an edge and hold it while both your hands work.
- A rivet set seats rivets in riveted joints; a drift pin lines up matching holes in two overlapping pieces before the fastener goes in.
Local 27's list is one local's requirement, not a catalog of the trade.
Two more hand tools sit in the sheet metal set.
A hand seamer is a flat-bladed tool that bends sheet metal edges in straight, controlled folds and flattens them again — how a seam gets closed and dressed by hand.
Duct crimpers put a series of crimps around the end of a round duct so it narrows enough to slide inside the next section or fitting.
Read Local 27's list for what it is: a pre-apprentice's list, staging what a new worker buys — a documented example, not a national norm, and not the whole journeyman bag.
If you are mapping the trade behind the bag, our sheet metal worker guide covers the job itself.
Layout tools: square, dividers, awl and center punch
Layout comes first in the order of work, and its tools are the small ones: on Local 27's list, a 12-inch combination square, 24-inch quick-set dividers, a scratch awl and a center punch, alongside the marker and pencil from the day-one kit.
- A combination square marks straight lines, checks square, and its graduated rule measures.
- Quick-set dividers scribe circles and arcs and step off equal distances — part of how a round fitting gets developed into the flat pattern that gets cut.
- A scratch awl scribes a line directly into the metal; a center punch dents it so a drilled hole starts on the mark instead of wandering.
The order of work repeats piece after piece — measure, mark, scribe, then cut — which is why these small tools ride next to the snips in the bag rather than in a drawer.
Shop machines: shears, brakes, rolls, lock formers
The trade's heavy tools stay in the shop rather than the tool bag: machines turn flat sheet into finished duct and fittings.
The four basics:
- Shears cut flat sheet in straight lines, to size.
- Brakes bend the sheet along those straight lines — boxes, pans and flat pieces.
- Rolls curve sheet into cylinders, where round duct starts.
- Lock formers roll the interlocking edge profile into the sheet — the lock that lets duct sections and fittings join mechanically.
Which machines a given shop runs is that shop's own setup.
What the shop-side job looks like day to day — CAD layout, plasma tables, coil lines, kitting the work for field crews — is the subject of our shop fabricator vs field installer guide; this page stays on the tools themselves.
Field power tools
The power layer is where the documented list stops: Local 27's pre-apprentice list is hand tools and layout tools only — no power tools appear on it.
The tool this page adds is the cordless drill and driver: it runs the self-tapping sheet metal screws that hold duct, hangers and equipment brackets together, and hole-making bits adapt it when a duct run needs an opening cut in.
Everything documented stays hand-powered — snips and seamers for the metal, the square and dividers for the marks.
Power tools are also where the who-buys question below starts to matter — ask it before you buy.
For the other side of the trade — meters, refrigerant gauges and recovery equipment — see our HVAC tools list.
What the contractor provides
Who buys what is an interview question.
No primary source our research found states what non-union shops typically furnish, so the honest answer is that it varies shop by shop, and you should ask before you buy.
That absence cuts both ways: nothing in our research documents that a shop hands you a full kit, and nothing documents that you buy everything yourself.
The documented examples all come from union agreements, and they run in both directions.
In sheet metal, SMART Local 27 stages what its pre-apprentices bring — the day-one, 30-day and 60-day lists above.
In the pipe trades, the Chicago-area Plumbers Local 130 agreement (2024-2028) goes the other way: journeymen furnish only small pliers and a rule, and all other tools are furnished by the employer.
UA Local 469 in Arizona (2024-2027) splits it — every journeyman and apprentice dispatched must have the hand tools on its Exhibit 2 list, while the employer furnishes a secure lock-up and replaces tools lost to fire, flood or forced-entry theft.
Local 130 and Local 469 are pipe trades' agreements — examples of how contracts handle tools, not a sheet metal norm.
When you interview, ask directly:
- Which tools does the shop furnish, and which do I bring?
- Is there a tool allowance or reimbursement, and how does it work?
- What happens if a tool is stolen from the truck or the shop?
- Do apprentices buy their list all at once, or stage it?
Career information, not legal advice: the tool-cost rule is federal, and the U.S. Department of Labor is the authority on it. Everything else on this page is union-agreement documents and what individual shops decide for themselves — confirm your employer's expectations, and your union contract if you have one, before you spend.
The federal rule behind required tool purchases